Hi GRBrown,
Welcome to the Heartland Owners Forum and to the family. We have a great bunch of folks here with lots of information and all willing to share their knowledge when needed.
I think on all the newer units the step light is controlled by the remote control. You do not have posted the kind of unit you have and if you would let us know, then the folks can be more accurate with their answers.
Enjoy the forum.
Jim M